loop to direct links (and reverse) transformation after node drag-and-drop in Sankey diagram

Links mode does not change from direct to loop or reverse after node drag-and-drop. The same thing happens if initial nodes position is changed with XY coordinates. It appears that the mode is fixed after initial alignment and that it cannot be changed despite changes in XY coordinates causing some loops to be broken and others to be created. HTML and Javascript environment.

https://plotly.com/python/sankey-diagram/

Expected behaviour: Links mode (loop to direct and reverse) is redefined after (or during) each change of node position (drag-and-drop or setting XY coordinates)

PS: this tool is amazing, I discovered it after using Google's оne, and its flexibility is incredible

Inizia con l’esempio di diagramma Sankey disponibile all’indirizzo https://plotly.com/python/sankey-diagram/ e riproduci il problema in un ambiente HTML/JavaScript trascinando i nodi e modificandone le coordinate XY. Verifica che links mode venga ricalcolato dopo ogni modifica della posizione, anche quando vengono creati o interrotti dei loop.